Machine for operating on shoe parts



May 17, V193s..

MACHINE FOR OPERATING ON SHOE PARTS Filed Aug. '7, 1956 W. sTAcEY 2,1'7,374

Patented May 17, 1938 PATENT OFFICE MACHINE FOR OPERATING ON SHOE PARTS Ernest W. Stacey, Beverly, Mass., assigner to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Application August 7,

11 Claims.

This invention relates to machines for operating upon shoe parts and is herein illustrated as embodied in a machine for rounding a sole, reducing the margin thereof in the forepart and shank, and roughing the reduced localities.

Machines of this type include a jack, a pattern to which the sole is clamped, tools `including roughing cutters for operating upon the sole, and means for causing the sole to be rounded and otherwise operated upon. In the illustrated machine, the tool carrier is moved toward the jack to cause certain guide rolls to contact with the pattern, and thereafter movements of translation and rotation are imparted to Athe jack to cause the tools to round the sole and perform the other operations upon it.

It is desirable that the bearings of the guide rolls be lubricated and that lubricant be applied to a guide rail against which a suitably shaped face on the jack is held. The roughing operation, however, produces a large quantity of leather dust which collects in the bearings of the rolls and upon the surface of the guide rail. In order to provide proper lubrication and to avoid this objectionable collecting of dust, the guide rolls and the guide rail facing are made of a non-metallic material carrying a solid lubricant, for example of a resinous material impregnated with graphite.

It is desirable that the patterns used should be as light and at the same time as wearresistant as possible. It is also desirable that their sole-contacting faces should be such `that soles clamped against them should be firmly held without danger ofmarring the surfaces of the soles. To this end the patterns are made of nonmetallic material and are faced with rubber.

These and other features of the` invention will be described as embodied in an illustrated machine and pointed out in the appended claims.

Referring to the accompanying drawing,

Fig. 1 is a perspective of a portion of a machine in which the present invention is embodied;

Fig. 2 is a perspective on an enlarged scale of a pattern which is used in the machine.

The illustrated machine, except for certain features which will be pointed out later, is or may be the same as the machinesshown and described in United States Letters Patent Nos. 2,078,981 and 2,081,961, granted respectively on May 4, 1937 and June 1, 1937, upon applications led in my name; and beforedescribing` the novel features, the old construction will be briefly outlined.

1936, Serial No. 94,805

There is shown in Fig. 1 a portion of a machine for operating upon a block sole |00. The sole is clamped on a pattern (shown more in detail in Fig. 2) carried by a jack 5 the base of which has a bearing surface 'I which is rounded at both ends of the jack and is straight at the two sides, said surface being held in contact with a guide rail 9 while movements of translation and rotation are imparted to the jack. The jack slides forward along the rail with one straight side of the surface 1 sliding on the rail; it then rotates 180 about one end to bring the other straight side of the surface 'I in Contact with the guide roll; it then slides forward again and then swings 180 about the other end, whereupon the jack, and with it the sole, occupies once more its initial position. While the sole is moved in this manner, it is acted upon by certain tools which round the sole, reduce the forepart and shank, rough the reduced margin and trim the edge. These tools are arranged in two groups, one group consisting of rounding cutters Il and shank reducing cutters I3, and the other group consisting of forepart reducing cutters I5 and edge trimming cutters I1, the reducing cutters serving not only to reduce the shank and forepart of the sole but to rough the reduced margin. The two groups of cutters are rotated respectively about two parallel axes, the two groups being mounted on a carrier which is pivoted midway between the axis on an arm, said arm being swung toward the jack before the movement of the jack begins and being yieldingly held in that position until the jack completes its cycle of movement. In order to hold the cutters in proper position with respect to the sole during the `operation upon the sole, there are provided two guide rolls 2|, 23 and a slidable controller 25. The pattern 3 is sole-shaped and is provided around its heel end with a groove 2l, and` around its other end with a registering groove 29. The guide rolls 2l, 23 run on the lower part 3l of the pattern, the guide roll 2| being concentric with the axis of rotation of the forepart reducing cutters I5 and the edge trimming cutters I1, and the guide roll 23.being concentric with the axis of rotation of the rounding` cutters Il and the shank reducing cutters I3. The shank reducing cutters I3 are normally in the raised inoperative position shown and are moved down at the proper time by the action of the controller 25 which engages the heel end of the pattern in the groove 21 and the forepart of the pattern in the groove 29. In the shank portion of the pattern the controller engages the ungrooved surfaces 33. The controller is slidable in a pathgperpendicular to the axis of rotation of the rounding cutters II and the shank reducing cutters I3, and normally projects beyond the periphery of the guide roll 23. When the controller rides out of one of the grooves 2'I, 29 upon the ungrooved surfaces 33, it is pushed in; and this movement of the controller, through suitable connections, causes the shank reducing cutters I3 to be brought down upon the sole so as to perform the shank reducing operation. No further description of the machine will be given here, reference being made to the prior applications for furtherdetails of construction.

In a machine of this type a great deal of dust is produced by the action of the toothed cutters I3, I5 which reduce the forepart and shank of the sole and rough the surface of the reduced localities. The guide rolls 2l, 23 are rotatable on upright spindles, the head of the spindle upon which the roll 2i rotates being indicated at 35. These guide rolls should, of course, rotate freely. When, however, cil or grease is supplied to their bearings, the ne leather dust collects in the lubricated localities and interferes with the free rotation of the rolls. In order to remedy this difficulty, the rolls are made of a non-metallic material carrying a lubricant, for example the material known to the trade as Textolite impregnated with graphite. Graphited TeXtolite consists of fibrous material such as layers of fabric impregnated with and bound together by a resin of the phenolic condensation type carrying graphite. Other suitable materials may be employed which carry a lubricant. With a construction of this kind wherein no dust-collecting liquid or viscous substance such as oil or grease is present, there is nothing to attract the dust generated by the operation of the machine.

The effective portion or facing 3l of the guide rail 9, where dust collects if a liquid or viscous lubricant is applied to it, is also made of a nonmetallic substance carrying a solid lubricant and may be made of the same materials which have been described above as being suitable for the rolls ZI, 23. The bearing face of the guide rail thus carries its own lubricant in a dry form, with the result that no dust from the machine collects upon this face or upon the cooperating face 'I of the jack.

The pattern 3 is made of a non-metallic, preferably resinous, material such as Textolite. In order to ensure that the sole blank Iilil shall be securely held on the pattern by the clamp, the pattern, which is used with one face up for right soles and with the other face up for left soles, has both faces provided with a rubber or rubbery surface. As herein illustrated, there are cemented and vulcanized to the upper and lower faces of the pattern sheets of fabric having vulcanized to them sheets of rubber. In Fig. 2, the toe end of the sheet of fabric 39 has been shown pulled up from the upper face of the pattern, and the sheet of rubber QI pulled up from the fabric merely for purposes of illustration. In the manufacture of the patterns, there is attached to each face of a board of Textolite of the proper thickness a laminated sheet of fabric and rubber. From this board so prepared the pattern blanks are sawed out. Their edges are machined and grooved and the two holes 43 are drilled to receive locating pins carried by the jack. The grain surface (which is sometimes a nished surface) of the sole to be operated upon is clamped against the pattern; and the rubber facing of the pattern serves to hold the sole firmly without any danger of marring the grain surface of the sole.

When at the start of the operation the arm which carries the tools is swung toward the jack to cause the guide rolls 2I, 23 to contact with the pattern, there is a tendency for the rolls to rebound. This tendency, however, is lessened when the guide rolls and the pattern are made of the materials described above.

Having thus described. my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A machine for operating upon shoe part blanks having, in combination, a jack, a pattern carried thereby to which a blank is clamped, a tool adapted to remove finely divided material from the blank, and a guide roll of non-metallic material impregnated with a lubricant associated with the tool and adapted to run on the edge of the pattern.

2. A machine for operating upon shoe part blanks having, in combination, a jack, a pattern carried thereby to which a blank is clamped, a tool adapted to remove inely divided material from the blank, and a guide roll of non-metallic material reinforced with a brous substance and impregnated with a lubricant associated with the tool and adapted to run on the edge of the pattern.

3. A machine for operating upon shoe part blanks having, in combination, a jack, a pattern of resinous material carried thereby to which a blank is clamped, a tool adapted to remove finely divided material from the blank, and a guide roll of non-metallic material reinforced with a fibrous substance and impregnated with a lubricant associated with the tool and adapted to run on the edge of the pattern.

4. A machine for operating upon shoe part blanks having, in combination, a jack, a pattern carried thereby to which a blank is clamped, a tool adapted to remove nely divided material from the blank, and a guide roll of resinous material impregnated with a lubricant associated with the tool and adapted to run on the edge of the pattern.

5. A machine for operating upon shoe part blanks having, in combination, a jack, a pattern of resinous material carried thereby to which a blank is clamped, a tool a-dapted to remove finely divided material from the blank, and a guide roll of resinous material impregnated with a lubricant associated with the tool and adapted to run on the edge of the pattern.

6. A machine for operating upon shoe part blanks having, in combination, a jack, a pattern carried thereby to which a blank is clamped, a tool adapted to remove finely divided material from the blank, an-d a guide rail of non-metallic material impregnated with a lubricant with which the jack is held in contact while it is moved bodily and angularly.

7. A machine for operating upon shoe part blanks having, in combination, a jack, a pattern carried thereby to which a blank is clamped, a tool adapted to remove finely divided material from the blank, and a guide rail of resinous material impregnated with a lubricant with which the jack is held in contact while it is moved bodily and angularly.

8. A machine for operating upon shoe part blanks having, in combination, a jack, a pattern of non-metallic material carried thereby to which a blank is clamped, a tool adapted to remove finely divided material from the blank, a guide roll of non-metallic material impregnated with a lubricant associated with the tool and adapted to run on the pattern, and a guide rail of nonmetallic material impregnated with a lubricant with which the jack is held in Contact While it is moved bodily and angularly.

9. A machine for operating upon shoe part blanks having, in combination, a jack, a pattern of resinous material carried thereby t0 which a blank is clamped, a tool adapted to remove nely divided material from the blank, a guide roll of resinous material, impregnated with a lubricant, associated with the tool and adapted to run on the pattern, and a guide rail of resinous material impregnated with a lubricant with which the jack is held in contact While it is moved bodily and angularly.

10. A machine for operating upon shoe part blanks having, in combination, a jack, a pattern of resinous material reinforced with a brous substance carried thereby to which a blank is clamped, a tool adapted to remove finely divided material from the blank, a guide roll of resinous material reinforced with a fibrous substance and impregnated with a lubricant associated with the tool and adapted to run on .the pattern, and a guide rail of resinous material reinforced with a brous substance and impregnated with a lubricant with which the jack is held in Contact While it is moved bodily and angularly.

11. A machine for operating upon shoe part blanks having, in combination, a jack, a pattern having a blank-contacting face of resilient material, a tool adapted to remove nely divided material from the blank, and a guide member of resinous material impregnated with a lubricant associated with the .tool and adapted to run on the edge of the pattern. 

